It's not often that I get a "canon" feeling from the dialogue like this. Well-done on the part of the artist/author, and a big thank-you to the translators.
I see why ZUN never liked the idea of aging his characters.
What I'm getting at is, you'll be in that situation yourself someday.That kind of troublesome talk doesn't mean anything to me, y'know.Well, that's a fine how-do-you-do!
And here I was, about to clue you in at long last...Humans are creatures that grow older as they live on, no?Oh, it's you.You got business with Reimu, too?Just wait and see. It would be best if this went off without a hitch...Well, that sure came outta left field!